This is critical and I wish more over the ear headsets had it. sind. One very poorly printed piece of paper that was almost impossible to read and it did not contain much info to start with. Two out of the three stopped working after a week and one even melted and burned a hole in our carpet! Hiking boots I only had room for 2 pairs on a shelf. you can have the perfect fit! Its irritating. They are just a little looser than I like but I just slide my foot a little farther into the shoe and they fit fine. Seam came apart on install with gentle pressure. I would size up by half a size.